@react-native-module/get-random-values/lib/cjs/node_modules/fast-base64-decode/index.js

implementation of getRandomValues for React Native

'use strict';

var lookup = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 62, 0, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 63, 0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51];

var fastBase64Decode = function base64Decode (source, target) {
  var sourceLength = source.length;
  var paddingLength = (source[sourceLength - 2] === '=' ? 2 : (source[sourceLength - 1] === '=' ? 1 : 0));

  var tmp;
  var byteIndex = 0;
  var baseLength = (sourceLength - paddingLength) & 0xfffffffc;

  for (var i = 0; i < baseLength; i += 4) {
    tmp = (lookup[source.charCodeAt(i)] << 18) | (lookup[source.charCodeAt(i + 1)] << 12) | (lookup[source.charCodeAt(i + 2)] << 6) | (lookup[source.charCodeAt(i + 3)]);

    target[byteIndex++] = (tmp >> 16) & 0xFF;
    target[byteIndex++] = (tmp >> 8) & 0xFF;
    target[byteIndex++] = (tmp) & 0xFF;
  }

  if (paddingLength === 1) {
    tmp = (lookup[source.charCodeAt(i)] << 10) | (lookup[source.charCodeAt(i + 1)] << 4) | (lookup[source.charCodeAt(i + 2)] >> 2);

    target[byteIndex++] = (tmp >> 8) & 0xFF;
    target[byteIndex++] = tmp & 0xFF;
  }

  if (paddingLength === 2) {
    tmp = (lookup[source.charCodeAt(i)] << 2) | (lookup[source.charCodeAt(i + 1)] >> 4);

    target[byteIndex++] = tmp & 0xFF;
  }
};

module.exports = fastBase64Decode;